[polyfill] - Sometimes there's an empty array and no overlays are shown

[jasonwilliams]

In the examples sometimes the polyfill breaks, this is because the polyfil relies on element timing which sometimes returns entries that are all zereo'd out. The polyfill then doesn't have enough data to carry forward any container timing information to the user, so an empty array may appear.

The polyfill fix would be to not emit any entries if the array is empty. The underlying fix would be in Chromium itself, I've raised this upstream https://issues.chromium.org/issues/379844652

Example